Improvement in stereotype-plate holders



AM. PHOTO-U THUGRAPH/C ca M K (0:50am: mocsss) UNITED STATES PATENTOFFICE FREDERICK SCHOLEFIELD, OF CHICAGO, ILLINOIS.

IMPROVEMENT IN STEREOTYPE-PLATE HOLDERS.

Specification forming part of Letters Patent No. 138,290, dated April29, 1873 application filed January 11, 1873.

To all whom it may concern:

Be it known that I, FREDERICK ScHoLE- FIELD, of Chicago, in the countyof Cook and State of Illinois, have invented a new and usefulImprovement in Stereotype-Plate Holders; and I do declare that thefollowing is a true and accurate description thereof, reference beinghad to the accompanying drawing and to the letters of reference markedthereon and being a part of this specification, in which- Figure 1 is alongitudinal section through a; no in Fig. 2, which is a perspectiveview of the plateholder, and Fig. 3 is a cross-section on y y in Fig. 1.

Like letters indicate like parts in each figure. The nature of thisinvention relates to a device for griping and holding stereotype-plateswhile they are being mounted, no part of the griper projecting above theplane of the plate. The invention consists in a griping slide, mow ingin dovetail ways at the sides of a slot in the table. The under side ofthe slide carries a toothed rack, with which meshes a wormgear,journaled in standards underneath, for moving the slide back and forth,the wormgear being driven by aworni on an upright shaft journaled inbrackets behind the gear, which shaft has a squared head, so that it maybe turned by a socket-wrench.

1n the drawing, A represents oneof the sectional blocks which supportthe stereotypeplate, and in which is cut a slot with dovetail ways aformed in its sides. On these ways moves a slide, B, whose top is flushwith the surroundingparts, except at the rear end where there is agriper, b. On the under side of the slide is formed a toothed worm-rack,0. Under the slot is a pair of longitudinal webs, A, in which is journaled a worm-gear,C,which meshes with the rack 0. Behind the gear andbetween the webs are two horizontal brackets, d, one above the other, inwhich is journaled the vertical shaft D, to which is secured, betweenthe brackets, a worm, c, meshing with and giving motion to the wormwheel C in the rotation of the shaft D, which has a squared head toreceive a socketwrench, E, which is detached therefrom except while theslide is being moved. I

The construction and arrangement of the griping device insure theholding of a stereotype-plate with great power, while there is no partprojecting above the table to obstruct the manipulations of the workman.

What I claim as my invention, and desire to secure by Letters Patent,is-

The griping-slide B provided with the rack c and moved in the ways a bymeans of the worm-gear C and the worm c on the vertical shaft 1),substantially as described.

FREDERICK SCHOLEFIELD. Witnesses:

WM. H. Lorz, H. S. SPRAGUE.

